<!DOCTYPE html>
<html>
<head>
  <title>5 pulse</title>
  <style type="text/css">
    /*
 *  Usage:
 *
      <div class="sk-spinner sk-spinner-pulse"></div>
 *
 */
.sk-spinner-pulse {
  width: 40px;
  height: 40px;
  margin: 40px auto;
  background-color: #333;
  border-radius: 100%;
  -webkit-animation: sk-pulseScaleOut 1s infinite ease-in-out;
          animation: sk-pulseScaleOut 1s infinite ease-in-out; }

@-webkit-keyframes sk-pulseScaleOut {
  0% {
    -webkit-transform: scale(0);
            transform: scale(0); }
  100% {
    -webkit-transform: scale(1);
            transform: scale(1);
    opacity: 0; } }

@keyframes sk-pulseScaleOut {
  0% {
    -webkit-transform: scale(0);
            transform: scale(0); }
  100% {
    -webkit-transform: scale(1);
            transform: scale(1);
    opacity: 0; } }

  </style>
</head>
<body>
 

      <div class="sk-spinner sk-spinner-pulse"></div>
</body>
</html>